old mark position on local mark ring. Also push the old mark on
global mark ring, if the previous mark was set in another buffer.
-Immediately repeating this command activates `transient-mark-mode' temporarily.
+When Transient Mark Mode is off, immediately repeating this
+command activates `transient-mark-mode' temporarily.
With prefix argument \(e.g., \\[universal-argument] \\[set-mark-command]\), \
jump to the mark, and set the mark from